P0106 on a Mazda: Causes, Fixes & Repair Cost
🟠 Moderate severity · drivable
Safe to drive, but expect rough idle, worse fuel economy, and reduced power until the vacuum leak or sensor issue is fixed.
What P0106 means on a Mazda
On a Mazda, P0106 means the engine computer sees a manifold absolute pressure (MAP) sensor reading that doesn't match the expected range for engine speed and load. The MAP sensor sits on the intake manifold and helps the computer measure engine load, so a bad reading throws off fuel delivery. The cause is usually a vacuum leak or a weak sensor rather than a serious engine problem.
Is P0106 common on Mazdas?
P0106 shows up on Mazdas with higher mileage, most often Mazda3, Mazda6, and CX-5 models. Cracking intake hoses and PCV lines are the usual leak sources, and the MAP sensor itself can weaken with age. It is a common, fixable fault, not an engine failure.
Commonly reported on: Mazda3, Mazda6, CX-5, CX-9.
Symptoms
- Check engine light is on
- Rough or unstable idle
- Poor fuel economy
- Reduced power or hesitation when accelerating
Common causes
- most common: Vacuum leak at an intake hose or gasket
- common: Faulty or failing MAP sensor
- common: Cracked or clogged vacuum line to the sensor
- less common: Loose or corroded sensor connector or wiring
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Inspect and replace cracked vacuum hoses | Yes | $10–60 |
| Clean or replace the MAP sensor | Yes | $40–130 |
| Repair the connector or wiring | Mechanic | $60–180 |
Frequently asked questions
Other common Mazda codes
P0106 on other brands
Looking for the full (non-brand-specific) guide? See the P0106 code page →
Browse all Mazda codes: Mazda hub →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.